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journal.go
42 lines (37 loc) · 989 Bytes
/
journal.go
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package fleet
import (
"fmt"
"os"
)
// Journal prints the systemd journal of target unit(s)
func (c *FleetClient) Journal(target string) (err error) {
units, err := c.Units(target)
if err != nil {
return
}
for _, unit := range units {
runJournal(unit)
}
return
}
// runJournal tails the systemd journal for a given unit
func runJournal(name string) (exit int) {
u, err := cAPI.Unit(name)
if err != nil {
fmt.Fprintf(os.Stderr, "Error retrieving Unit %s: %v", name, err)
return 1
}
if suToGlobal(*u) {
fmt.Fprintf(os.Stderr, "Unable to get journal for global unit %s. Check the logs on the host using journalctl.\n", name)
return 1
}
if u == nil {
fmt.Fprintf(os.Stderr, "Unit %s does not exist.\n", name)
return 1
} else if u.CurrentState == "" {
fmt.Fprintf(os.Stderr, "Unit %s does not appear to be running.\n", name)
return 1
}
command := fmt.Sprintf("journalctl --unit %s --no-pager -n 40 -f", name)
return runCommand(command, u.MachineID)
}